MongoDB is an open source document-oriented database. These types of databases are highly flexible, allowing structure variations in the documents, and MongoDB can save even documents partially. With lots of powerful features and advantages, the Aggregation Framework is one of the most powerful features of MongoDB. In MongoDB, the Aggregation framework is used to process data records/documents and return computed results. We can group documents and perform various operations, use join within a database, merge collection, and many more exciting …
